3720181 has 8 divisors (see below), whose sum is σ = 4086720. Its totient is φ = 3370752.

The previous prime is 3720179. The next prime is 3720209. The reversal of 3720181 is 1810273.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3720181 - 2¹ = 3720179 is a prime.

It is a super-2 number, since 2×3720181² = 27679493345522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3720121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3820 + ... + 4693.

It is an arithmetic number, because the mean of its divisors is an integer number (510840).

Almost surely, 2^3720181 is an apocalyptic number.

It is an amenable number.

3720181 is a deficient number, since it is larger than the sum of its proper divisors (366539).

3720181 is a wasteful number, since it uses less digits than its factorization.

3720181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8555.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 3720181 is about 1928.7770736920. Note that the first 3 decimals coincide. The cubic root of 3720181 is about 154.9487308758.

The spelling of 3720181 in words is "three million, seven hundred twenty thousand, one hundred eighty-one".